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Re: What fuel Mileage do you get with your 5th Ave?
[Re: 76dodgeboy]
#1317817
10/11/12 10:23 PM
10/11/12 10:23 PM
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Joined: Feb 2006
Posts: 1,179
Canada
demon
super stock
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super stock
Joined: Feb 2006
Posts: 1,179
Canada
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I drove an 80 Diplomat every day in 96-98. It was a stock 318 with lockup converter and high gears-2.45 I think. Only mods were electronic ignition and dual exhaust with glass packs. It got 27mpg Canadian (22 1/2 US) on the highway in 90 degree heat with the A/C blasting. Great car. Shoulda kept it.
Then I got a 86 5th Ave with same driveline but lean burn still functioning. It would get 25mpg Canadian (20 1/2 US) on the highway. The low first gear gave them enough power to pull out without feeling sluggish. Great cars. Both were super reliable.
Last edited by demon; 10/11/12 10:26 PM.
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Re: What fuel Mileage do you get with your 5th Ave?
[Re: 76dodgeboy]
#1317819
10/12/12 05:53 AM
10/12/12 05:53 AM
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Joined: Jun 2006
Posts: 277
Cincinnati, Ohio
chargincharles
enthusiast
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enthusiast
Joined: Jun 2006
Posts: 277
Cincinnati, Ohio
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Quote:
I posted asking what headers etc will fit a 5th ave. I wanna know what you guys are pulling down for mileage in yours and what your combo is. Also what size tanks do they have? Mine might need a carb swap and leanburn delete already  .
The first summer I had my 82 Fifth, Stone Stock- between 15-18mpg city, and 18-22 mpg highway. Really depended on how hard I pressed the 'GO' pedal...
Today-
318--Magnum Heads- Hooker Headers- Full 2 1/2" Dual Exhaust system connected to headers and with Flowmaster Mufflers (no Cats)- Crosswinds Intake- Carter AVS carb- Jegs Cam- HEI Ignition (leanburn delete, emissions delete)- recurved distributor- A/C Delete- High flow Water Pump- 3-core replacement radiator- Aux Oil and Transmission Coolers- B & M shift-kitted trans- 3.55 Sure-Grip 8 1/4 rear- 205's sized tires.
Makes TONS of power down low, and runs all day long at 75-80mpg on the highway with zero issues-(just higher RPMS)...and will beat most modern cars hands down. And fuel milage-
10-12 mpg city, 12-15 highway.
Again- depends on the 'GO' pedal and how hard I stomp it.
I also need to run Plus gasoline (89 octane here) because I get some pinging with 87 (regular) and 93 burns tooooooo fast...as in...I like to push that pedal too much when I'm running premium. The Magnum heads up the CR from the dismal 8.5- something to more like 9-something.
Keep in mind that the 5th is basically about as aerodynamic as a Cinder Block, has a large V8 and is choked with more emissions equipment that just about anything I have ever worked on. You are LUCKY to get the kind of milage I got when she was stone stock.
Any way you slice it- a 5th ave is NEVER a good fuel economy car. What it is- The nicest riding Luxury-type car I've driven in quite some time. And Also- About the biggest SLEEPER car I can think of.
No one expects the Grandpa-mobile to eat their lunch in a drag race. That's what makes it fun!
Just my pennies,
CC.
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Re: What fuel Mileage do you get with your 5th Ave?
[Re: 76dodgeboy]
#1317824
10/12/12 10:25 PM
10/12/12 10:25 PM
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Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
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I get around 22 on the highway 15 in town. No one is buying it so I am building a superduper MPG 318 EFI magnum motor for it, hoping for 30 MPG hwy.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: What fuel Mileage do you get with your 5th Ave?
[Re: 76dodgeboy]
#1317830
10/16/12 08:06 AM
10/16/12 08:06 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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if you don't have a shop that mandrel bends or you can't weld your own up from pre-bent mandrel bent section, personally, I'd just go with this setup from summit lots of guys on dippy.org have used it. you just have to move your gas tank over 1 rib...
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: What fuel Mileage do you get with your 5th Ave?
[Re: 76dodgeboy]
#1317832
10/17/12 08:59 PM
10/17/12 08:59 PM
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Joined: Nov 2006
Posts: 1,074
Manitoba Canada
67autocross
super stock
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super stock
Joined: Nov 2006
Posts: 1,074
Manitoba Canada
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This one would pull in the low 20's on the highway with the 2 barrel and 2:40 gears and the lean burn changed out and dual exhaust.
A new iron curtain drawn across the 49th parallel
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Re: What fuel Mileage do you get with your 5th Ave?
[Re: 76dodgeboy]
#1317834
10/18/12 10:42 AM
10/18/12 10:42 AM
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Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,487
Kalispell Mt.
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Mine is so quiet and smooth I often find myself cruising much lower than the speed limit, guess I am getting old as I do really enjoy driving this thing (Insert Old man walking with a cane smiley here!)
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: What fuel Mileage do you get with your 5th Ave?
[Re: HotRodDave]
#1317835
10/18/12 01:07 PM
10/18/12 01:07 PM
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Joined: Aug 2006
Posts: 8,064
Iowa
76dodgeboy
OP
master
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OP
master
Joined: Aug 2006
Posts: 8,064
Iowa
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Quote:
Mine is so quiet and smooth I often find myself cruising much lower than the speed limit, guess I am getting old as I do really enjoy driving this thing (Insert Old man walking with a cane smiley here!)
I like driving it. I had a gold one just like yours. If you'd have been closer and I saw it Id have jumped on yours but I only gave $850 for this obey with a new battery and tires with about 300-500 miles object them and a full tank if gas. Interior needs some tlc before may but Mainly the headliner. Needs a grill and center piece between tail lights and I hope to get it painted.
Just ordered the headers and some air shocks to bring the back up a little and to fit 215s a little better when they go on
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